Silencer



W. T. PhARCY.

SILENCER.

APPLICATION FILED uov.2|, 192l- Patented July 11, 1922.

A TTORNEY.

PATENT OFFICE.

WALTER T. PEARCY. OF NEW ALBANY. INDIANA.

SILENCER.

Application filed November 21, 1921.

To all whom it may concern:

Be it known that Var/ran T. PnARcY, a citizen of the United States of America. rcsiding at New Albany, in the county of Floyd and State of Indiana, has invented certain new and useful Improvements in Silencers, of which the following is a specification.

This invention relates to automobile engines and has special reference to an antirattling device for use in connection with the valve tappets of the Chevrolet 490 automobile engine and which I preferably term a valve tappet silencer.

One important object of the invention is to provide a simple and improved device of this character which will eliminate the clicking and rattling of valve tappets.

A second important obje t of the invention is to provide a simple and improved device of this character which, when applied to the tappet lock used with engines of the above description, will prevent side twisting thereof and thus give perfect aliuement at all times.

A third important object of the invention is to provide a simple and improved device of this character the use of which will cause the base of the valve lifter to ride squarely on the cam thus giving better action with reduced wear.

A fourth important object of the invention is to provide a simple and improved device of this character which will not in any way interfere with the adjustment of the tappet when applied thereto.

A fifth important object of the invention is to provide an improved and simple device of this character manufactured cheaply from a single blank of sheet metal struck out and bent to the proper shape to ensure close gripping of the tappet lock and at the same time to prevent accidental disengagement therefrom while permitting ready application or disengagement without the use of tools.

With the above and other objects in view, the invention consists in general of certain novel details of construction and combinations of parts hereinafter fully described. illustrated in the accompanying drawings: and specifically claimed.

Specification of Letters Patent.

Patented July 11, 1922.

Serial No. 516,655.

In the accompanying drawings. like char actors of reference indicate like parts in th several views. and:

Figure 1 is a perspective view of the valve tappet and adjacent parts as manufactured for the Chevrolet 490 engine.

Figure 2 is a perspective view of the silencer, partly broken away. the parts disclosed in Figure 1 being indicated in dotted lines in order to show the position of the silencer on the valve tappet.

Figure 3 is a side elevation of the tappet rod with the device applied thereto, the rod being shown in position in a section of the crank case and at the lower extremity of its movement.

Figure 4c is a detail view of the valve tappet and a portion of the crank case showing the tappet rod in high position with the silencer attached thereto.

Figure 5 is a detail view of the blank from which the silencer is made before the same is bent to shape.

In the accompanying drawings there is disclosed a valve tappet rod 10 which is screwed into a head 11, being locked into position by means of a nut 12. This head 11 is seated on a head 13 on the valve lifter, the base of which is indicated at 14. In the heads 11 and 13 are provided certain shallow grooves at 15 and in these grooves are engaged the opposed ends 16 of a spring metal tappet lock having an arcuate body-17 extending partly around the heads 11 and 13.

A portion of the crank case is indicated at 18 and this portion includes the valve lifter guide opening 19 and the guide shoulders. one of which is shown at 20, the other being immediatel behind the valve lifter as disclosed in Figure 4.

The silencer is made from a blank having a U-shaped body portion comprising a hight portion 21 and parallel legs 22. Extending opposite to the legs 22 from the bight portion 21 is a neck 23 carrying on its end a head 24 having an arcuate mouth 25. In forming the device from this blank the legs 22 are bent at right angles to the bight 21 close to said bight as indicated at 26 and between this bight and the extremity of each leg there is provided an arcuately bowed portion 27 whicln when the device is applied, bears against the respective guide shoulder 20. The neck 23 is likewise bent at an acute angle to the hight portion and the head 24 is bent intermediate its length so that its extremity lies substantially perpendicular to the neck 23, these bends being indicated at 28 and 2t respectively. From an inspection of Figures 3 and 4 it will be seen that the device when applied has the portions of the legs between the bends 2G and their extremities extending downward along the backs or portions 16 of the tappel locks while the neck 23 extends downward in front of the tappet leg so that the mouth engages the head 1 beneath said tappet lock. In applying the device it is simply necessary to slip the legs downward in such position as has just been described, the neck being; sprung outward to some extent to permit this. and then to allow the mouth to spring under the tappet lock. This it will be obvious, can be readily done witlr out the use of a tool. \Vhen in this position. it: will be seen that the nut 12 may be loosened and the ta ppet rod 10 adjusted in or out of the head ll without the silencer in any way interfering with such adjustment.

There has thus been provided a simple and ellicient device of the kind described and for the purpose specified.

It is obvious that minor changes may he made in the term and construction of the invention without departing from the material principles thereof. It is not therefore desired to confine the invention to the exact form herein shown and described, but it is wished to include all such properly come within the scope claimed.

Having thus described the invention. Tllllt is claimed as new, is:

1. In a device otthe kind described. a ody portion arranged to engage the tappct lock of an automobile and, provided with a pair of legs extending downward hehind said tappet lock and having resilient arcnatcly howcd portions intermediate their cll't'lllltlts adapted to bear against the tappct guide shoulders of a crank case.

As anew article of inanu la are. a hla n for tappet silencers consisting of a U-shaped body having a bignt portion and parallel legs. a neck extending from said hig ht portion in a direction opposite said legs and a head on the extremity of said neck provided with an arcuate month, said hlank being struck from a single strip of sheet metal.

3. A tappet silencer formed l'roni a single strip of sheet metal and having a U-shaped body including a hight portion. legs depending from the hight portion at right angles thereto and havin g arcuately bowed portions adjacent their extren'iities but in spaced re lation thereto, a neck extending i'liagonally downward from the center of the hight portion and toward said legs, and a head on the lower end of said neck having angularly disposed portions one ot which lies in tin plane of the neck and the other of which extends substantially at right angles thereto and is provided with an arcuate mouth.

in testimony whereof I a llix my signature.

WAL'ITER T, P'EARcY. 

